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    Home » Recipes » Blog

    Family Pleaser, Apple Walnut Crumble Slice

    June 19, 2018 By Sara McCleary Updated May 26, 2021 - This post may contain affiliate links

    Jump to Recipe

    Apple walnut crumble slice is filled with Australian Granny Smith apples and topped with a cinnamon and nutmeg laced walnut crumble.

    I do love the textural consistency of slices. Their bases can range from crunchy to cake like. The topping can be as simple as some icing to a more complex multi layer creation.

    This apple walnut crumble slice isn’t too difficult or time consuming if you are using a food processor. The base falls into the crunchy category and is biscuit in style. It has a simple filling of stewed apples which is then topped with a walnut crumble laced with cinnamon and nutmeg.

    An apple slice topped with buttery walnut crumble - Apple Walnut Crumble Slice
    A slice filled with tasty stewed apples - Apple Walnut Crumble Slice

    If you are a fan of apple crumble, then you will be a fan of this slice.

    I generally serve my apple walnut crumble slice once cooled, simply dusted with icing sugar (confectioners sugar). But you could also serve this slice straight from the oven with a nice big scoop of vanilla bean ice cream. A drizzle of caramel sauce wouldn’t go astray either.

    A great slice for picnics, Apple Walnut Crumble Slice

    The walnuts in the crumble are easily swapped out for your favourite nut. Pecans or almonds would be a tasty alternative.

    The simple apple filling could also be spruced up a little. This is easily done with the addition of a handful of dried sultanas or chopped dried apricots.

    The perfect family slice, Apple Walnut Crumble Slice

    As I keep saying to you guys, don’t leave your imagination at the kitchen door. If you have a great base recipe that the family loves, play around and change it up.

    Special equipment for this recipe

    Lamington Tin: A lamington tin is a rectangular baking tin 20cm x 30cm (8 x 12 inches) in size. It isn’t as deep as a brownie or cake tin.

    Apple crumble in slice form - Apple Walnut Crumble SliceSpecial Ingredients for this Recipe

    Granny Smith Apples: These are an Australian variety of apple, which are tart with a green skin. Any tart baking apple can be substituted.

    This slice is just as perfect served cold or served warm with some ice cream - Apple Walnut Crumble SliceWhat to do with any leftovers

    Leftovers can be stored in an airtight container for a couple of days. Recipe not suitable to freeze.

    If you love apple crumble then you will love this easy slice - Apple Walnut Crumble Slice

    Apple Walnut Crumble Slice

    Recipe Author: Sara McCleary
    Apple walnut crumble slice is filled with Australian Granny Smith apples and topped with a cinnamon and nutmeg laced walnut crumble.
    5 from 2 votes
    Print Recipe Pin Recipe
    Prep Time 20 mins
    Cook Time 55 mins
    Total Time 1 hr 15 mins
    Course Slices
    Cuisine Australian
    Servings 18 slices
    Calories 240 kcal

    Ingredients

    Slice Base

    • 230 grams (1 ½ cups) plain flour
    • 80 grams (½ cup) cornflour
    • 1 teaspoon baking powder
    • 75 grams caster sugar | superfine sugar
    • 125 grams butter
    • 1 egg
    • 60 ml (¼ cup) iced water

    Apple Filling

    • 6 granny smith apples

    Walnut Crumble

    • 60 grams butter
    • 125 grams (1 cup) plain flour
    • 90 grams ( ½ packed cup) dark brown sugar
    • ½ teaspoon baking powder
    • 1 teaspoon cinnamon
    • 1 teaspoon nutmeg
    • 2 teaspoons vanilla bean paste
    • 10 grams (1 ½ tablespoons) walnuts chopped

    Instructions
     

    • Preheat oven 180 deg C (360 deg F). Grease and line a 20cm x 30cm lamington tin with baking paper. Extend the baking paper 5cm above the edges of the tin.
    • In a food processor place flour, cornflour, baking powder, sugar, and butter. Process until fine crumbs form.
    • If you don’t have a food processor, place plain flour, cornflour, baking powder and butter (cut into small cubes) into a large bowl. Rub the butter through the dry ingredients with the tips of your fingers until the mixture resembles a fine crumb.
    • Add egg and cold water, process until the pastry dough comes together. If not using a food processor mix with a spoon and then knead until just combined.
    • Press dough into prepared lamington tin, evenly, until the base of the tin is covered.
    • Place lamington tin in the refrigerator for 20 minutes to chill.
    • While the base of the slice is chilling and then baking prepare the apple filling and walnut crumble.
    • Once chilled line pastry dough with a piece of baking paper. Top the baking paper with baking weights or uncooked rice.
    • Place in the oven and blind bake for 15 minutes or until the edges have just started to brown.
    • Remove baking weights (or rice) and baking paper. Bake for a further 8 – 10 minutes until base is lightly golden and remove from oven.
    • Increase oven temperature to 200 deg C (390 deg F).
    • Spread apple filling over the top of the pastry base and then top with the walnut crumble. Bake for 30 minutes or until the crumble is golden.
    • Cool on a wire cooling rack. Once cooled sprinkle with icing sugar and cut into squares.

    Apple Filling

    • Place apple slices with 125ml (½ cup) water in a large saucepan. Over a medium heat bring the mixture to a boil. Reduce heat, cover and simmer for 10 minutes. Stir occasionally, when apples are tender they are ready. Drain well.

    Walnut Crumble

    • In a large bowl place flour and butter. Rub butter through the flour with the tips of your fingers until the mixture resembles coarse breadcrumbs. Add sugar, baking powder, cinnamon, nutmeg, vanilla, and walnuts.

    Notes

    What is a Lamington Tin?
    A lamington tin is a rectangular baking tin 20cm x 30cm (8 x 12 inches) in size. It isn’t as deep as a brownie or cake tin.
    Granny Smith Apples
    Granny Smith Apples are an Australian variety of apple, which are tart with green skin. Any tart baking apple can be substituted.
    GENERAL COOK’S NOTES
    All oven temperatures are fan-forced, increase the temperature by 20°C (70°F) for convection ovens.
    All measurements are Australian tablespoons and cups. All measures are level, and cups are lightly packed unless specified.
    1 teaspoon equals 5ml
    1 tablespoon equals 20 ml (Nth America, NZ & UK use 15ml tablespoons)
    1 cup equals 250ml (Nth America use 237ml)
    4 teaspoons equal 1 tablespoon
    I use the below unless specified in my recipes.
    Herbs are fresh | Vegetables are of a medium size | Eggs are roughly 60 grams in weight (large).
     
    NUTRITIONAL INFORMATION BELOW IS A GUIDE ONLY

    Nutrition

    Calories: 240kcalCarbohydrates: 37gProtein: 3gFat: 9gSaturated Fat: 5gCholesterol: 31mgSodium: 80mgPotassium: 121mgFiber: 2gSugar: 16gVitamin A: 303IUVitamin C: 3mgCalcium: 25mgIron: 1mg
    Keyword apple walnut recipe, lunch box recipes, slices for fetes
    Did You Make This Recipe?I do a happy dance when people share how they went. Tag me on Instagram or Twitter @bellyrumbles & #bellyrumbles
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    Reader Interactions

    Comments

    1. Malcolm

      September 04, 2022 at 2:10 am

      Hi, the recipe looks good, but I have two questions. The ingredients list sugar for the base, the the instructions don't mention what to do with it. The instructions for the crumble mention baking powder, but the ingredients don't mention it at all. Thanks ...

      Reply
      • Sara McCleary

        October 17, 2022 at 5:54 pm

        Hi Malcolm
        Thanks for your questions, and they are good ones. I have amended the recipe for those two ingredients.
        Cheers, Sara

        Reply
    2. Trace

      May 06, 2021 at 9:36 pm

      5 stars
      Hi Sara, I'm love love loving baking your slice creations....mum especially so as she is the luckiest recipient in the world.
      For this one, when I'm out of apples (unfortunately) I must substitute canned apple or apricots. Roughly how much weight of tinned fruit should I use? Thanks

      Reply
      • Sara McCleary

        May 07, 2021 at 1:11 pm

        Hi Trace
        Happy to hear you are enjoying my recipes and that your mum is too ?
        I'm not sure where you are based, but I have made this recipe using a can of pie apples in the past. A can of pie apples is around 400g here in Australia, that's just over 14 oz (14.11 oz).
        The filling isn't quite as generous as using 6 apples, but it's pretty close. Two cans would be too much.
        By the way, an apricot substitute sounds delicious!
        Cheers, Sara

        Reply
    3. gardenley.com

      June 29, 2018 at 3:45 am

      Great recipe
      I think it will be very delicious. definitely I will make it.

      Reply
    4. mary

      June 20, 2018 at 8:53 pm

      5 stars
      Nice one

      Reply

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    Well hello there! I’m Sara McCleary a food photographer, creative recipe developer, and avid traveller (when the World isn’t in a pandemic).

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